<template>
	<ul>
		<li :style="{opacity}">欢迎学习Vue</li>
		<li>news001 <input type="text"></li>
		<li>news002 <input type="text"></li>
		<li>news003 <input type="text"></li>
	</ul>
</template>

<script>
	export default {
		name:'News',
		data() {
			return {
				opacity:1
			}
		},
		// beforeDestroy(){
		// 	console.log('News组件即将被销毁');
		// 	clearInterval(this.timer)
		// },
		// mounted(){
		// 	this.timer = setInterval(() => {
		// 		console.log('@')
		// 		this.opacity -= 0.01
		// 		if(this.opacity <= 0) this.opacity = 1
		// 	},16)
		// },
		activated(){
			console.log('News组件被激活了')
			this.timer = setInterval(() => {
				console.log('@')
				this.opacity -= 0.01
				if(this.opacity <= 0) this.opacity = 1
			},16)
		},
		deactivated(){
			console.log('News组件失活了')
			clearInterval(this.timer)
		}
	}
</script>